UWB Signal Detection via Frequency Sub-band Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic disturbance detectors are unable to effectively detect or discriminate ultra wide band (UWB) radiofrequency signals due to their slow response time, which is inadequate for the rapid variations characteristic of UWB signals.
Innovation Solution
A UWB signal detection device comprising a signal reception circuit, a signal divider circuit, amplitude and duration determinator circuits, comparison circuits for amplitude and duration thresholds, and a decision circuit to identify UWB signals, along with an alarm and data storage capability, enabling accurate detection and location of UWB signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional electromagnetic disturbance detectors using logarithmic amplifiers are used, then device complexity is reduced and ease of manufacture is improved, but response time is too slow (10 nanoseconds or more) to detect ultra wide band signals that vary in 0.1 nanoseconds
Solution Approach 1:
The detection device divides the received electromagnetic signal into multiple frequency sub-bands using a signal divider circuit. Each sub-band is then processed independently by dedicated detection circuits that measure amplitude and duration characteristics. This segmentation allows parallel processing of different frequency components, achieving fast response times for UWB signals while using conventional detection components in each sub-band.
Solution Approach 2:
The invention transitions from temporal domain analysis to frequency domain analysis by dividing the signal into frequency sub-bands. This dimensional change allows the use of slower logarithmic amplifier components in each frequency band while still capturing the fast temporal characteristics of UWB signals through the combined frequency-domain representation and duration measurement circuits.
2Measurement precision
If fast response time detection components are used to detect ultra wide band signals, then detection accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
By segmenting the broad frequency spectrum into multiple sub-bands, the invention enables the use of standard, commercially available detection components in each sub-band. This segmentation approach achieves accurate UWB signal detection through cumulative frequency-domain analysis rather than requiring a single complex fast-response component, thereby improving manufacturability.
Solution Approach 2:
The invention changes the operating parameters of conventional detection components by applying them to narrow frequency sub-bands rather than the full spectrum. This parameter change allows standard logarithmic amplifiers and detection circuits to achieve the necessary effective response time when processing individual sub-bands, making the system manufacturable with conventional components.
3Reliability
If conventional detection components with 10 nanosecond response time are used, then device simplicity is maintained, but false alarms increase in disturbed electromagnetic environments because they cannot distinguish rapid UWB signal variations
Solution Approach 1:
The signal divider circuit segments the electromagnetic spectrum into multiple frequency sub-bands, and the detection system measures both amplitude and duration characteristics in each sub-band. This segmentation enables the decision circuit to analyze the temporal pattern of signal variations across frequencies, distinguishing rapid UWB variations from slower electromagnetic interference, thereby reducing false alarms.
Solution Approach 2:
The decision circuit receives feedback from multiple amplitude measurement circuits and duration measurement circuits across different frequency sub-bands. By comparing the combined characteristics from all sub-bands against threshold criteria, the system dynamically determines whether a detected signal represents a true UWB event or background interference, significantly reducing false alarm rates.
Data Source
AI summary
A device for the detection of an ultra wide band signal, including a signal reception circuit, a signal divider circuit to divide the received signal into several frequency sub-bands, a circuit to determine the amplitude and duration of the received signal in each frequency sub-band, a circuit to compare the amplitude of the signal received in each frequency sub-band with an amplitude threshold, a circuit to compare the duration of the signal received in each frequency sub-band with a time threshold, and a decision circuit that determines that the received signal is of the ultra wide band type if the amplitude of the signal received in each frequency sub-band is higher than the amplitude threshold and if the duration of the signal received in each frequency sub-band is less than the time threshold.